Haulotte Group HT21RT O, Maintenance Book

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251 4000511390 E03.16 USA / GB
HT21RT O - HT21RT O SW - HT61RT O - HT21RT PRO - HT21RT PRO SW - HT61RT PRO -
HT23RTJ O - HT23RTJ O SW - HT67RTJ O - HT23RTJ PRO - HT23RTJ PRO SW - HT67RTJ PRO
E
Trouble shooting and diagram
Steering
Chk YV102/601/602
F04.01 (D)
Steering valves failure (steering mode function failures handled by F04.33)
1 --> YV102 : Steering proportionnal electrovalve failure while steering ( YV102 short
circuit to GND or to + 12V)
2 --> YV602 : Steering ON/OFF electrovalve failure (Open circuit or short circuit)
4 --> YV601 : Steering ON/OFF electrovalve failure (Open circuit or short circuit)
YV102 :
• Check connection to ground (Pin 2)
• Check connection to 12 V supply (YV102_S/pin3)
• Check connection to U100 ECU analogue output (Pin 1)
YV602/YV601 :
• Check connection to ground
• Check connection to U100 ECU
Note that YV102_S output is always seen as FAILURE, do not consider this information,
and open circuit on YV102 is not detectable
Compensation
Chk YV102/401/421
F04.02 (D)
Compensation valves failure
1 --> YV102 : Steering proportionnal electrovalve failure while steering ( YV102 short
circuit to GND or to + 12V)
2 --> YV401 : Compensation ON/OFF electrovalve failure (open circuit or short circuit)
while compensation movement
4 --> YV421 : Compensation ON/OFF electrovalve failure (open circuit or short circuit)
while compensation movement
YV102 :
• Check connection to ground (Pin 2)
• Check connection to 12 V supply (YV102_S/pin3)
• Check connection to U100 ECU analogue output (Pin 1)
YV401/YV421 :
• Check connection to ground
• Check connection to U100 ECU
Note that YV102_S output is always seen as FAILURE, do not consider this information,
and open circuit on YV102 is not detectable
Turret rotation
Chk YV880/890
F04.03 (D)
Turret rotation valves failure
1 --> YV880 : Turret rotation proportional electrovalve failure while turret rotation
movement ( YV880 short circuit to GND or to + 12V)
2 --> YV890 : Turret rotation safety valve failure (open circuit or short circuit) while turret
rotation movement
YV880 :
• Check connection to ground (Pin 2)
• Check connection to 12 V supply (YV880_S/pin3)
• Check connection to U100 ECU analogue output (Pin 1)
YV890 :
• Check connection to ground (via LSD1.x U100 digital output)
• Check connection to U100 ECU
Note that YV880_S output is always seen as FAILURE, do not consider this information,
and open circuit on YV880 is not detectable
Failure Code Description